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Secondary battery

a second battery and battery technology, applied in the field of second batteries, can solve the problems of high manufacturing cost, low adhesion strength between components, and inability to position the resin molding part in its molding state,

Active Publication Date: 2007-08-30
SAMSUNG SDI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when a conventional lithium secondary battery is assembled, the material of the resin molding part fixedly coupling the battery protection components with the bare cell is different from the material of the bare cell and the contact area of the resin molding part is narrow.
Accordingly, the adhesive strength between the components is low, and the resin molding part cannot be positioned in its molding state without twisting of the resin molding part occurring.
As such, lead plates are typically expanded or the reinforcing structure of the secondary protective element is formed separately, resulting in higher manufacturing costs.

Method used

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Embodiment Construction

[0021]As illustrated in FIG. 1, a lithium secondary battery 100 according to an exemplary embodiment of the present invention includes a bare cell 110 and a protective circuit board 150 connected to the bare cell.

[0022]The bare cell 110 includes a can 120, an electrode assembly 122 housed in the can 120, and a cap assembly 130 sealing the can 120. Furthermore, a secondary protective element 140 is formed on the upper part of the cap assembly 130.

[0023]The can 120 may be metal having an approximately hexhedronal shape, and the can 120 itself may serve as a terminal. The top of the can 120 has an opening through which the electrode assembly 122 is insertable.

[0024]The electrode assembly 122 includes cathode plates 123, anode plates 125 and separators 124. After the cathode plates 123 and the anode plates 125 are stacked with the separators 124 interposed between them, they may be wound in a jelly-roll configuration. A cathode tab 126 is welded to the cathode plates 123, and an end of ...

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Abstract

A secondary battery includes a bare cell having an electrode assembly. The electrode assembly has cathode plates, anode plates and separators insulating the cathode plates from the anode plates. The secondary battery also includes a can housing the electrode assembly, the can having an opening for receiving the electrode assembly and a cap assembly having a cap plate sealing an opening of the can, the cap plate having a terminal through-hole, an electrode terminal inserted into the terminal through-hole, and a gasket insulating the electrode terminal from the terminal through-hole. A protective circuit board is coupled to the bare cell and a molding resin molds the protective circuit board with the bare cell. The gasket includes a coupling extension constraining the molding resin at the cap plate.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims the benefit of Korean Patent Application No. 10-2006-18708, filed on Feb. 27, 2006, and Korean Patent Application No. 10-2006-103358, filed on Oct. 24, 2006, both applications filed in the Korean Intellectual Property Office, the entire content of which is incorporated herein by reference.BACKGROUND[0002]1. Field of the Invention[0003]The present invention relates to a secondary battery, and more particularly, to a secondary battery having an improved coupling structure of a resin molding part molded on a bare cell.[0004]2. Description of the Prior Art[0005]As video cameras, cellular phones, portable computers and other electronic devices have become more sophisticated, much research has been conducted on secondary batteries used to power such devices. A secondary battery may be, for example, a nickel-cadmium battery, a nickel-hydrogen battery, a nickel-zinc battery, a lithium secondary battery and other similar ba...

Claims

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Application Information

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IPC IPC(8): H01M2/08H01M2/06F16J15/10H01M50/147H01M50/176H01M50/566
CPCH01M2/022H01M2/0404H01M2/0434H01M2200/10H01M2/30H01M10/052H01M2200/00H01M2/06Y02E60/10H01M50/107H01M50/147H01M50/176H01M50/566
Inventor UH, HWAILCHOI, BUMKUK
Owner SAMSUNG SDI CO LTD
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